This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-bambooinvoice-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 15:52:35 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1c9ee8ad0e77ff9c21362c010ec4db30c83d8818 * md5sum 7de7d2fa6656ce2b89ec6868dc82d097 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRcBa4AAoJEIXCXpWhbrlNBGAIANn0UxVRvyxnBcozWkTrutnm cjhflqy5KvOMtvy/i3wghdDtfUeZ8cKTzjPvjhWDig2z08bj0UzpBOWAxfBnwzEq EesTboGrZj5biLkNJ0XyakjBBKuI9DAlZUab/w4CZgegVxjiTAeNqBthkrceZU6e JQkavm/oDQxrZRsSduRM7QP60dEy/fnfm9a7heXukghamxc1lcK3fgfcxW05BxNQ WlMO9PdwcqPm+/G83mz3VBAqj3pylZrsgddv07QkS1jIRWfxQqjPxMnlVroxBb+6 PzZGZgxUxdOdWnUJPpuHgCUqufLHTXFK4z9zNs9zIzIJB7dC5nTxgqxicP50Q5s= =QQs5 -----END PGP SIGNATURE-----